Edit DevicesIntroductionThe primary editing device of a computer is the system unit that houses thecentral processing unit (CPU) and the disk drive. The CPU reads softwareand directs the actions of the peripherals, and the disk drive electronicallystores and retrieves software and information.System unitThe large box that encloses the CPU and the disk drive is called the systemunit. A horizontally oriented system unit lies flat on a desk top. A systemunit that stands upright is a tower unit. The system unit houses themotherboard, the disk drives, the power supply, and the expansion ports.Figure 3-5 shows a system unit.Figure 3-5. —The system unit.Continued on page page3-12
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
